Here are a few title options, keeping in mind the question-answer format: **Short & Direct:** * **How can I extend MIME type detection in Go beyond the default http.DetectContentType limitations

Extending MIME Type Detection in Go

In Go's net/http package, the http.DetectContentType([]byte) function provides a way to determine the MIME type of a given byte slice. However, this function only supports a limited number of types.

To detect additional mime types, particularly docx, doc, xls, xlsx, ppt, pps, odt, ods, and odp files, it is necessary to rely on the content of the file rather than its extension. This is because these file formats share the same signature as zip files.

One solution to this problem is to use a specialized package for MIME type detection based on content. Three popular options include:

• filetype

  • Written entirely in Go
  • Can be extended to detect new MIME types
  • Stores matching functions in a map, potentially resulting in inconsistent traversal order
  • Detects a limited number of MIME types

• magicmime

  • Relies on the libmagic-dev library
  • Detects the largest number of MIME types among the three options
  • Extensibility is more complex, requiring understanding of libmagic
  • Libmagic is not thread-safe

• mimetype

  • Written entirely in Go
  • Detects more MIME types than filetype
  • Thread-safe
  • Supports extensibility

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